Is there a site or sites out there on the net which feature(s) sample or actual built sketchup files of timber frame and post & beam homes that can be downloaded either for free or at low cost for my practice (w Sketchup) & research, and perhaps as a launching platform for our own build ideas? I know there are a few on this site, but I am hoping to find more variety.

Possibly there are some files out there that can be converted, which I believe gets to the issue of sketchup make versus sketchup Pro. If I understand correctly, only sketchup Pro can interpret DWG and such files.